My object method suggestion was wrong. However, you can dump the data structure to see why it (apparently) isn't finding the information: 
my $def_obj = CGI::self_or_default($filename);
use Data::Dumper;
print Dumper $def_obj->{'.tmpfiles'};

[download]
Caution: Contents may have been coded under pressure.

In reply to Re^5: IE vs. Firefox : Can't use an undefined value as a HASH reference error by Roy Johnson
in thread IE vs. Firefox : Can't use an undefined value as a HASH reference error by hmbscully

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